环境: centos6.5_x64
准备:
两台mysql机器
主1 master: 192.168.32.130
主2 backup: 192.168.32.131
VIP: 192.168.32.100
步骤:
1.配置mysql的双主架构
2.安装keepalived
keepalived-1.2.23.tar.gz
yum -y install openssl openssl-devel
wget http://www.keepalived.org/software/keepalived-1.2.23.tar.gz
tar zxvf keepalived-1.2.23.tar.gz
cd keepalived-1.2.23
./configure --prefix=/usr/local/keepalived --with-kernel-dir=/usr/src/kernels/2.6.18-164.el5-i686
make && make install
3.把keepalived设置为系统服务
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
mkdir /etc/keepalived/
cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
4.修改keepalived配置
vi /etc/keepalived/keepalived.conf //详见.conf详细配置
vi /usr/local/keepalived/mysql.sh
#!/bin/bash pkill keepalived
chmod +x /usr/local/keepalived/mysql.sh
/etc/init.d/keepalived start
5.测试
5.1 分别在两台mysql机器上授权, 允许用户远程登录
mysql> grant all on *.* to‘kkk‘@‘192.168.32.%‘ identified by ‘123456‘;
mysql> flush privileges;
5.2 在任何一台机器上, 通过虚拟IP来连接mysql服务器
mysql -ukkk -p123456 -h192.168.32.100
5.3 停止master，看是否能正常切换到backup，然后来查看VIP在哪台服务器上
service mysqld stop
ip addr
5.4 master服务器故障恢复后，是否主动抢占资源，成为活动服务器 (取决于这个参数nopreempt)
keepalived.conf详细配置
! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
[email protected]
[email protected]
}
notification_email_from [email protected]
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 100 #优先级 (backup设置为90)
advert_int 1
nopreempt #不主动抢占资源，只在master这台优先级高的设置 (backup不设置)
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.32.100
}
}
virtual_server 192.168.32.100 3306 {
delay_loop 2
#lb_algo wrr
#lb_kind DR
persistence_timeout 60
protocol TCP
real_server 192.168.32.130 3306 { #真实mysql服务器的ip地址
weight 3
notify_down /usr/local/keepalived/mysql.sh #貌似没有执行脚本, why?
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
;